343-105

343105 Externally Relieved Body Screw

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Datasheet. 343-105 specification

Thread Class
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.

2a

Thread Direction
The direction of the thread when viewed axially. a right-hand thread winds in a clockwise direction while a left-hand thread winds in a counterclockwise direction.

RIGHT-Hand

Thread Length
A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.

0.172in. ⁓11/64"

Fastener Length
The dimension,measured along a line parallel to the longitudinal axis,from the largest bearing surface of the fastener head to the extreme opposite end,or as specifically designated for other type fasteners.

0.500in. ⁓1/2"

Head Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.

pan no. 2

Head Diameter
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.

0.256in. and 0.270in.

Head Height
A measurement from the bottom to the top of the head,in distinction from depth.

0.087in. and 0.097in. ⁓7/64"

First Diameter From Head

0.094in. and 0.098in.

Distance From Largest Bearing Surface Of Head To End Of First Diameter

0.328in.

Internal Drive Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.

cross recess type 1

Nominal Thread Diameter
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.

0.138in. (UTS #6)

Thread Quantity Per Inch
The number of threads on the item per linear inch measured on a line parallel to the thread axis.

32

Minimum Tensile Strength
The maximum rated load in tension applied in a longitudinal direction,per unit of cross-sectional area,that the material can withstand without rupture.

80 pounds per square inch

Externally Relieved Body Diameter Quantity
The number of externally relieved diameters on the body,adjacent to the head.

1

Special Features
Those unusual or unique characteristics or qualities of an item not covered in the other requirements and which are determined to be essential for identification.

make from MS51957-30

Material
The chemical compound or mechanical mixture properties of which the item is fabricated.

steel comp 302 or steel comp 303 or steel comp 304 or steel comp 305 or steel comp 316

Material Document And Classification
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.

66 fed std all material responses or aisi assn std all material responses or sae assn std all material responses

Surface Treatment
The metallic,nonmetallic,and/or chemical properties with which the item is plated,dipped,and/or coated.the treatment is designed to protect the surface(s) and cannot be wiped off.

passivate

Surface Treatment Document And Classification
The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material.

MIL-F-14072-E300 mil spec single treatment response

Thread Series Designator
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.

unc

Answers.

What class is the thread series?

Unc

What material is the externally relieved body screw made of ?

Steel comp 302 or steel comp 303 or steel comp 304 or steel comp 305 or steel comp 316

What is the thread quantity per inch?

32

What is the head style?

Pan no. 2

What is the thread length?

0.172 inches

What is the thread direction?

Right-hand

What is the thread class?

2a

What is the NSN for 343-105?

5305-01-165-9161

How is this classified for shipping?

Schedule B number: 7318152000
Bolts and bolts and their nuts or washers exported in the same shipment

What's the federal classification of 343-105?

FSC 5305 ⁓ Screws

NSN 5305-01-165-9161 SCREW,EXTERNALLY RELIEVED BODY

unc thread series passivate surface treated make from MS51957-30 32 thread quantity per inch pan no. 2 head style 0.172" thread length right-hand 2a thread class

NIIN
011659161
NIIN Date
11/04/83
Schedule B
7318152000 
Name Code
01852
FIIG
A003B0
DEMIL / ITAR
Uncontrolled item (Code A)
Hazmat
No hazard information available from HMIRS.
MSDS
N/A
Precious Metals
Metal content unknown
Enviromental
N/A
Electrostatic ESD & EMI
No ESD or EMI sensitivity

Major End Users Countries and entities

  • - Germany 
  • - Italy 

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Nothing similar to this part number was found in our inventory

343-105 / Screw,externally relieved bodyWhat is the formal definition of this item?

An externally threaded fastener whose threaded portion is of one nominal diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a maximum diameter less than the minimum pitch diameter of the thread (excludes undercut for thread relief). it is no. 0 (0.060 in.) (1.5 mm) or larger, and is designed to be held or driven with either a wrench or inserted driver (excluding internal socket and multiple spline types) or both in sizes below no. 10 (0.190 in.) (5 mm) and larger sizes must have a head designed for any type inserted driver (excluding internal socket and multiple spline types) but may also be designed for external wrenching. a locking feature may be incorporated in the design of the head or threads. see also bolt, externally relieved body and bolt, internal wrenching.